If you're running a Mac and purchased a digital copy of Neverwinter Nights 2 from anywhere other than the official Mac App Store, then Aspyr's newly released v1.1 patch should take care of a spell-related graphical glitch for you. Word is:

This patch is ONLY for digital (no disc) versions of NeverWinter Nights 2 that were NOT purchased from The Mac App Store.

This is an official update for Neverwinter Nights 2 digital versions that were not purchased from the Mac App Store. It will fully update the digital release of Neverwinter Nights 2. It should not be used for the Mac App Store release or boxed copy of Neverwinter Nights 2.